Rudolf Bartoš, the owner of a farm, quarry and factory, is extremely rich, however, he is unapproachable and irritable, and the dread of his employees. One day he falls down a steep slope by a river and hurts himself. The quarryman Fábera finds him groaning in pain and takes him to his cottage.

The management of the Meteor motorcycle factory is forced by a representative of the central headquarters to accept the expensive design of a racing machine and abandon the unfinished prototype of a folk motorcycle of their own design. However, the factory's workers and technical team decide to complete the prototype of the "Pepíky", as they call their five-hundred-horsepower motorcycles, ahead of schedule.